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Usefulness of LDL-C-related parameters to predict cardiovascular risk and effect of pravastatin in mild-to-moderate

Kyoichi Mizuno1, Noriaki Nakaya, Tamio Teramoto

  • 1Department of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan. mizunok@nms.ac.jp

Journal of Atherosclerosis and Thrombosis
|December 2, 2011
PubMed

Insights

Non-HDL cholesterol and the LDL-C/HDL-C ratio better predict cardiovascular disease risk and pravastatin efficacy in Japanese patients than LDL-C alone. These lipid parameters offer improved cardiovascular risk assessment for hypercholesterolemia management.

Area of Science:

  • Cardiology
  • Clinical Lipidology
  • Preventive Medicine

Background:

  • Cardiovascular disease (CVD) remains a leading cause of mortality globally.
  • Accurate prediction of CVD risk is crucial for effective primary prevention strategies.
  • Assessing the efficacy of lipid-lowering therapies like pravastatin requires reliable predictive biomarkers.

Purpose of the Study:

  • To evaluate the predictive ability of low-density lipoprotein cholesterol (LDL-C), non-high-density lipoprotein cholesterol (non-HDL-C), and the LDL-C/HDL-C ratio for cardiovascular disease (CVD) risk.
  • To determine which lipid parameter best predicts the efficacy of pravastatin treatment in Japanese patients with mild-to-moderate hypercholesterolemia.
  • To compare the predictive power of these lipid parameters against LDL-C alone.

Main Methods:

  • A large-scale randomized primary prevention trial (MEGA Study) in Japan involving 7832 mild hypercholesterolemic patients.
  • Patients were randomized to diet alone or diet plus pravastatin groups and followed for an average of 5 years.
  • Comparative analysis of baseline lipid levels, CVD incidence, and time-dependent receiver operating characteristic curves to assess predictive accuracy.

Main Results:

  • Non-HDL-C and the LDL-C/HDL-C ratio demonstrated significantly graded correlations with CVD incidence.
  • Higher levels of non-HDL-C (> 186 mg/dL) and LDL-C/HDL-C (> 2.9) were associated with increased CVD events.
  • LDL-C/HDL-C and non-HDL-C were found to be more predictive of CVD risk and pravastatin efficacy than LDL-C alone, reclassifying 32% of patients.

Conclusions:

  • Non-HDL-C and LDL-C/HDL-C are superior predictors of CVD risk in Japanese individuals with mild-to-moderate hypercholesterolemia compared to LDL-C.
  • These lipid parameters are more valuable for evaluating pravastatin's therapeutic effect.
  • Independent interpretation of non-HDL-C and LDL-C/HDL-C is recommended for comprehensive CVD risk assessment.
Abstract

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